JPH01219395A - Blower for air conditioner - Google Patents

Abstract

PURPOSE:To facilitate air quantity regulating operation, enlarge air quantity regulating range of a blower in the title and make the blower smaller by engaging a disk-shape air quantity regulating plater inside a vane-wheel and fixing the disk-shaped air quantity regulating plate to the shaft of an electric motor such that the disk-shaped air quantity regulating plate is disposed adjustably in the shaft direction of the electric motor and the vane-wheel. CONSTITUTION:Vane-wheels 2 are accommodated inside casings 1 which have intake ports 6a and 6b on the surfaces of both ends. Center plates 5, which are engagingly fixed to a shaft 4a of an electric motor, are set inside the vane- wheels 2. Disk-shaped air quantity regulating plates 10 are engaged inside the vane-wheels 2. The disk-shaped air quantity regulating plates 10 are fixed to the shaft 4a of the electric motor such that the disk-shaped air quantity regulating plates 10 are disposed adjustably in the direction of the shaft 4a of the electric motor and the vane-wheels 2. The above-mentioned mechanism can facilitate air quantity regulating operation, enlarge air quantity regulating range and make the blower smaller.

Description

[Detailed description of the invention] [Industrial usage total]

The present invention relates to a blower device for an air conditioner that allows air to pass through a heat exchange device of the air conditioner.

[Conventional technology]

FIG. 3, FIG. 4, and FIG. 5 are a perspective view, a vertical sectional view, and a partially exploded perspective view of a conventional general air blower for an air conditioner. In Figures 3 to 5, 1 is a casing, and the casing 1 has suction holes 1a and lb on both end faces.
is formed, and a Suita mouth 1c is formed on the front surface. 2 is a blade wheel housed in the casing 1, and the blade wheel 2 has a large number of forward-facing blades 2a arranged in a cylindrical shape. 3a, 3
b is a bell mouth provided in the suction holes 1a and lb of the casing 1; 4 is an electric motor with motor shafts 4a protruding from both end faces; 5 is a disc fitted and fixed in the axial center of the impeller 2; The center plate 5 is fitted and fixed to the motor shaft 4a. Note that the bell mouth 3a on the side opposite to the electric motor 4 is screwed and fixed to one end surface of the casing 1 so that it can be removed when the impeller 2 is housed in the casing 1, and the bell mouth 3b on the side of the electric motor 4 is integrally attached to the casing 1. Suction ports 6a, 6b are formed on the inner periphery of the bell mouths 3a, 3b. Further, as described above, the blower devices 7 each consisting of a sirocco fan are configured symmetrically on both the left and right sides of the electric motor 4. In the air conditioner blower configured as described above, the electric motor shaft 4a and the center plate 5 are driven by the Wi electric motor.
As the impeller 2 rotates within the casing 1, air is sucked in through the suction ports 6a and 6b, and the blades 2a of the impeller 2
By blowing out the air from the outlet IC toward a heat exchanger (not shown) through the outer periphery of the air and passing through the heat exchanger,
Heat exchange is performed between air and a refrigerant flowing inside the heat exchanger. By changing the wiring and electric circuit of the electric motor 4, its rotational speed is changed to adjust the air volume. Further, FIG. 6 is a longitudinal cross-sectional view of the impeller portion of a conventional air blower for an air conditioner disclosed in Japanese Utility Model Application No. 55-85592. In FIG. 6, 2 is a blade wheel, 4a is a motor shaft,
In the impeller 2, a cylindrical groove 20 is formed in the end plate 2b, a part of the air volume adjustment inner cylinder 8 is fitted into the cylindrical groove 2C so as to be movable in the axial direction, and the other part is similarly fitted in the blade 28 part. The air volume adjusting inner cylinder 8 is fixed to the end plate part 2b by a plurality of set bolts 9 which are fitted into the end plate part 2b and screwed into the end plate part 2b from the outer circumferential side. This blower for an air conditioner rotates a blade wheel 2 within a casing (not shown) by a motor shaft 4a.
Air is sucked into the impeller 2 through a suction port provided on the end face of the casing, and the air is blown out from an air outlet provided in the casing through the outer periphery of the blades 2a. Then, after loosening the set bolt 9 and moving the air volume adjustment inner cylinder 8 in the axial direction, tightening the bolt 9 changes the length of the portion where the blade 2a performs the air blowing operation, thereby adjusting the air volume. ing.

[Problem to be solved by the invention]

In the conventional air conditioner blower shown in Figs. 3 to 5, the star (human) shape and delta (Δ)
Since the air volume is adjusted by changing the rotational speed of the electric motor using electric means using shape switching and phase control, there is a problem in that it is expensive. In addition, in the blower shown in Fig. 6, the air volume is adjusted by mechanical means, so there is no need to change the rotation speed of the electric motor, but the air volume can be adjusted by adjusting the axial dimension (length) of the air volume adjustment inner cylinder. Since the range is determined, the axial dimensions of the entire device, including the impeller and casing, become longer, and the air volume adjustment range is also restricted, and set bolts must be provided at at least three locations in the circumferential direction of the air volume adjustment inner cylinder. However, there were problems in that loosening and tightening the set bolts when adjusting the air volume was troublesome and time-consuming, and the structure was also complicated. This invention was made to solve the above-mentioned problems, and has a simple structure, easy air volume adjustment work, and a wide range of air volume adjustment (which increases the axial dimension of the device). The purpose of the present invention is to obtain a blower device for an air conditioner that can be made inexpensively by mechanical means without increasing the length.

[Means to solve the problem] This invention provides a blower for an air conditioner consisting of a sirocco fan, in which a disc-shaped air volume adjustment plate is fitted into a blade wheel, and the air volume adjustment plate is fixed to a motor shaft so as to be movable in an axial direction with respect to the blade wheel and the motor shaft. This is what I did. [For production]

In the air blower according to the present invention, the disk-shaped air volume adjustment plate is
The inside of the impeller wheel is divided into a part that blows air on the suction side and a part that does not blow air on the center plate side, so if you want to increase the air volume, move the air volume adjustment plate close to the center plate inside the impeller. To reduce the air volume, the air volume adjusting plate can be moved axially relative to the impeller and the motor shaft so that it approaches the suction port of the casing. The air volume can be increased or decreased by mechanical means without changing the number, and the structure is simple, just adding parts such as an air volume adjustment plate and a push screw for fastening it to the motor shaft. The number of cylinders is small, making it easy to adjust the air volume by moving the air volume adjustment plate in the axial direction.The air volume adjustment plate has a significantly shorter axial dimension than the conventional air volume adjustment inner cylinder, making it possible to widen the air volume adjustment range. Moreover, there is almost no need to increase the axial dimensions of the impeller, casing, and other devices compared to those shown in FIGS. 3 to 5. .

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In Figures 1 and 2, 1 is a casing, 2 is a blade wheel,
3a and 3b are bell mouths, 4 is an electric motor, 5 is a center plate, 6a and 6b are suction ports, and each of the above parts is a third
It has the same configuration as the conventional air conditioner blower device 7 shown in FIGS. Reference numeral 10 denotes an air volume adjustment plate in which a disk 10b having an outer diameter somewhat smaller than the inner diameter of the impeller 2 is fitted and fixed on the outer periphery of a boss portion 10a that is slidably fitted onto the motor shaft 4a protruding from both end faces of the electric motor 4. It is. The air volume adjustment plate 10 is fitted to the impeller 2 so as to be movable in the axial direction so as to partition the inside of the impeller 2, and is fastened by pressing a screw (not shown) screwed into the boss portion 10a onto the motor shaft 4a. has been done. In the blower device 7 of the embodiment configured as described above, the third
Although the basic operation is the same as that of the conventional device shown in FIGS. 5 to 5, the air volume is adjusted by moving the air volume adjustment plate 10 in the axial direction. That is, the air volume adjustment plate 10 can be moved in the axial direction by tightening the push screw inserted into the boss portion 10a, and in this state, the air volume can be increased (if necessary, the air volume adjustment plate 10 can be moved to the center plate 5). If it is necessary to bring the air volume adjustment plate 10 closer to the bell mouth 3b on the motor 4 side, then fix the boss portion 10a to the motor shaft 4a by tightening the pusher or the like. When the air volume adjustment plate 10 is brought closer to the center plate 5, the distance between the air volume adjustment plate 10 and the end of the bell mouth 3b of the impeller 2 becomes longer, and the axial dimension of the portion where the impeller 5 performs the air blowing operation becomes longer ( When the air volume increases and the air volume adjustment plate 10 is moved closer to the bell mouth 3b, the part where the impeller 5 performs the air blowing operation becomes shorter (and the air volume decreases. The impeller 2 does not perform air blowing operation in the area between. In the above embodiment, the air volume adjustment plate 10 was provided only between the center plate 5 and the bell mouth 3b on the motor 4 side. Similarly, an air volume adjustment plate may be installed between the center plate and the bell mouth on the side opposite to the motor by fitting it into the extension of the motor shaft.In this way, the air volume adjustment range can be adjusted to the same level as in the above embodiment. In addition, in the above embodiment, the casing 1 is provided with bell mouths 3a, 3b to form the suction ports 6a, 6b, but in this invention, the bell mouths 3a, 3b are provided in the casing 1, and the suction ports 6a, 6b are formed without providing a bell mouth. The suction holes provided on both end faces may be used as the suction ports.Furthermore, in the present invention, the fastener for fastening the air volume adjustment plate to the motor shaft is not limited to a set screw, but can be used with a spanner, screwdriver, etc. when the air blower is assembled. Preferably, the air volume adjustment plate can be loosened or tightened using a tool such as a hexagonal wrench. [Effects of the Invention] As explained above, the air blower for an air conditioner of the present invention A disc-shaped air volume adjustment plate was fitted inside the car, and the air volume adjustment plate was fixed to the motor shaft so that it could move in the axial direction with respect to the impeller and motor shaft. By dividing the part into the part that performs air blowing operation on the suction side and the part that does not perform air blowing operation on the center plate side, and moving the air volume adjustment plate in the axial direction relative to the impeller and motor shaft, the air can be sent by mechanical means. The air volume can be increased or decreased, there is no need to change the rotation speed of the motor by electrical means, and the structure is simple, just adding an air volume adjustment plate and a part to fasten it to the motor shaft, so it is inexpensive. In addition, since the number of parts such as push screws that fasten the air volume adjustment plate to the motor shaft is small, it is easy to adjust the air volume by moving the air volume adjustment plate in the axial direction. Because the axial dimension is significantly shorter than the air volume adjustment inner cylinder of The effect of being compact can be obtained without increasing the length.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a blower for an air conditioner according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of the same, and FIG. 3 is a perspective view showing an example of a conventional blower for an air conditioner. , FIG. 4 is a longitudinal sectional view of the same, FIG. 5 is an exploded perspective view of the same part, and FIG. 6 is a longitudinal sectional view of the impeller portion showing the other side of the conventional air blower for an air conditioner. 1... Casing, IC... Air outlet, 2... Impeller, 2
a...Blade, 3a, 3b...Bell mouth, 4...Electric motor, 4a...Motor shaft, 5...Center play), 6
a. 6b...Suction port, 7...Air blower, 10...Air volume adjustment plate, 10a...Boss portion, 10b...Disc plate. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent: Masuo Oiwa (2 others) Figure 1 Figure 3 Figure 5 Procedural amendment (voluntary) Showa year, month, day 2, name of invention: air blower device for air conditioner 3, name of person making the amendment ( 601) Mitsubishi Electric Corporation Representative Moriya Shiki 4, Agent Address 2-2-3-5 Marunouchi, Chiyoda-ku, Tokyo
, Subject of amendment (1) Detailed explanation of the invention in the specification (2) Brief explanation of the drawings in the specification column 6, Contents of the amendment (1) "Longitudinal section" in the 19th line of the first page of the specification The phrase "top view" should be corrected to "exploded perspective view." (2) On page 1, line 20, it says "exploded perspective view".
Correct it to "longitudinal cross-sectional view". (3) In the 5th line of page 8, the word "push" is corrected to "push screw." (4) On page 10, line 19 of the same page, it says "longitudinal sectional view".
Correct it to "disassembled perspective view". (5) In the 20th line of page 10, the phrase "exploded perspective view" is corrected to read "longitudinal sectional view."

Claims (1)

[Claims] The impeller is housed in a casing with suction ports on both end faces,
In an air conditioner blower device comprising a sirocco fan having a center plate fitted and fixed to the motor shaft and fixed inside the impeller, a disc-shaped air volume adjustment plate is fitted inside the impeller,
A blower device for an air conditioner, characterized in that an air volume adjustment plate is fixed to a motor shaft so as to be movable in the axial direction with respect to the motor shaft and the impeller.